package org.bouncycastle.mail.smime.handlers;

import java.awt.datatransfer.DataFlavor;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.activation.ActivationDataFlavor;
import javax.activation.DataContentHandler;
import javax.activation.DataSource;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMultipart;

public class multipart_signed implements DataContentHandler {
	
	/*  
	 *  
	 *  VARIABLES
	 *  
	 */ 
	
    private static final ActivationDataFlavor ADF;
    private static final DataFlavor[]         ADFs;
    
	/*  
	 *  
	 *  CONSTRUCTORS
	 *  
	 */ 
	
    static {
		ADF  = new ActivationDataFlavor(MimeMultipart.class, "multipart/signed", "Multipart Signed");
		ADFs = new DataFlavor[] { ADF };
	}
	
	/*  
	 *  
	 *  BUSINESS METHODS
	 *  
	 */ 
	
	
	public Object getContent(DataSource _ds) 
		throws IOException {
		
		try {
			return new MimeMultipart(_ds); 
		} catch (MessagingException ex) {
			return null;
		}
	}
	
	public Object getTransferData(DataFlavor _df, DataSource _ds) 
		throws IOException {
		
		if (ADF.equals(_df)) {
			return getContent(_ds);
		}
		else {
			return null;
		}
	}
	
	public DataFlavor[] getTransferDataFlavors() {
		return ADFs;
	}
	
	public void writeTo(Object _obj, String _mimeType, OutputStream _os) 
		throws IOException
    {
		
		if (_obj instanceof MimeMultipart)
        {
			try
            {
				((MimeMultipart)_obj).writeTo(_os);
			}
            catch (MessagingException ex)
            {
				throw new IOException(ex.getMessage());
			}
		}
		else if(_obj instanceof byte[])
        {
			_os.write((byte[])_obj);
		}
        else if (_obj instanceof InputStream)
        {
            int			b;
			InputStream	in = (InputStream)_obj;

            while ((b = in.read()) >= 0)
            {
                _os.write(b);
            }
        }
        else
        {
            throw new IOException("unknown object in writeTo " + _obj);
        }
	}
}
